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/*
* Alias PIX image routines for CUPS.
*
* Copyright 2007-2011 by Apple Inc.
* Copyright 1993-2007 by Easy Software Products.
*
* These coded instructions, statements, and computer programs are the
* property of Apple Inc. and are protected by Federal copyright
* law. Distribution and use rights are outlined in the file "COPYING"
* which should have been included with this file.
*
* Contents:
*
* _cupsImageReadPIX() - Read a PIX image file.
* read_short() - Read a 16-bit integer.
*/
/*
* Include necessary headers...
*/
#include "image-private.h"
/*
* Local functions...
*/
static short read_short(FILE *fp);
/*
* '_cupsImageReadPIX()' - Read a PIX image file.
*/
int /* O - Read status */
_cupsImageReadPIX(
cups_image_t *img, /* IO - cupsImage */
FILE *fp, /* I - cupsImage file */
cups_icspace_t primary, /* I - Primary choice for colorspace */
cups_icspace_t secondary, /* I - Secondary choice for colorspace */
int saturation, /* I - Color saturation (%) */
int hue, /* I - Color hue (degrees) */
const cups_ib_t *lut) /* I - Lookup table for gamma/brightness */
{
short width, /* Width of image */
height, /* Height of image */
depth; /* Depth of image (bits) */
int count, /* Repetition count */
bpp, /* Bytes per pixel */
x, y; /* Looping vars */
cups_ib_t r, g, b; /* Red, green/gray, blue values */
cups_ib_t *in, /* Input pixels */
*out, /* Output pixels */
*ptr; /* Pointer into pixels */
/*
* Get the image dimensions and setup the image...
*/
width = read_short(fp);
height = read_short(fp);
read_short(fp);
read_short(fp);
depth = read_short(fp);
/*
* Check the dimensions of the image. Since the short values used for the
* width and height cannot exceed CUPS_IMAGE_MAX_WIDTH or
* CUPS_IMAGE_MAX_HEIGHT, we just need to verify they are positive integers.
*/
if (width <= 0 || height <= 0 ||
(depth != 8 && depth != 24))
{
fprintf(stderr, "DEBUG: Bad PIX image dimensions %dx%dx%d\n",
width, height, depth);
fclose(fp);
return (1);
}
if (depth == 8)
img->colorspace = secondary;
else
img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_RGB : primary;
img->xsize = width;
img->ysize = height;
cupsImageSetMaxTiles(img, 0);
bpp = cupsImageGetDepth(img);
if ((in = malloc(img->xsize * (depth / 8))) == NULL)
{
fputs("DEBUG: Unable to allocate memory!\n", stderr);
fclose(fp);
return (1);
}
if ((out = malloc(img->xsize * bpp)) == NULL)
{
fputs("DEBUG: Unable to allocate memory!\n", stderr);
fclose(fp);
free(in);
return (1);
}
/*
* Read the image data...
*/
if (depth == 8)
{
for (count = 0, y = 0, g = 0; y < img->ysize; y ++)
{
if (img->colorspace == CUPS_IMAGE_WHITE)
ptr = out;
else
ptr = in;
for (x = img->xsize; x > 0; x --, count --)
{
if (count == 0)
{
count = getc(fp);
g = getc(fp);
}
*ptr++ = g;
}
if (img->colorspace != CUPS_IMAGE_WHITE)
switch (img->colorspace)
{
default :
cupsImageWhiteToRGB(in, out, img->xsize);
break;
case CUPS_IMAGE_BLACK :
cupsImageWhiteToBlack(in, out, img->xsize);
break;
case CUPS_IMAGE_CMY :
cupsImageWhiteToCMY(in, out, img->xsize);
break;
case CUPS_IMAGE_CMYK :
cupsImageWhiteToCMYK(in, out, img->xsize);
break;
}
if (lut)
cupsImageLut(out, img->xsize * bpp, lut);
_cupsImagePutRow(img, 0, y, img->xsize, out);
}
}
else
{
for (count = 0, y = 0, r = 0, g = 0, b = 0; y < img->ysize; y ++)
{
ptr = in;
for (x = img->xsize; x > 0; x --, count --)
{
if (count == 0)
{
count = getc(fp);
b = getc(fp);
g = getc(fp);
r = getc(fp);
}
*ptr++ = r;
*ptr++ = g;
*ptr++ = b;
}
if (saturation != 100 || hue != 0)
cupsImageRGBAdjust(in, img->xsize, saturation, hue);
switch (img->colorspace)
{
default :
break;
case CUPS_IMAGE_WHITE :
cupsImageRGBToWhite(in, out, img->xsize);
break;
case CUPS_IMAGE_RGB :
cupsImageRGBToWhite(in, out, img->xsize);
break;
case CUPS_IMAGE_BLACK :
cupsImageRGBToBlack(in, out, img->xsize);
break;
case CUPS_IMAGE_CMY :
cupsImageRGBToCMY(in, out, img->xsize);
break;
case CUPS_IMAGE_CMYK :
cupsImageRGBToCMYK(in, out, img->xsize);
break;
}
if (lut)
cupsImageLut(out, img->xsize * bpp, lut);
_cupsImagePutRow(img, 0, y, img->xsize, out);
}
}
fclose(fp);
free(in);
free(out);
return (0);
}
/*
* 'read_short()' - Read a 16-bit integer.
*/
static short /* O - Value from file */
read_short(FILE *fp) /* I - File to read from */
{
int ch; /* Character from file */
ch = getc(fp);
return ((ch << 8) | getc(fp));
}
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